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['NFB', 'GWW', 'MAT', 'EFX', 'SNV', 'SO', 'AN', 'UST', 'KO', 'ACV', 'SNA', 'NI', 'EXC', 'RHI', 'UNP', 'NYT', 'BBT', 'CCL', 'XRX', 'PH']